Home / 20,967.45-28,919.96-12,011.68

Finding the Fourth Proportional to 20,967.45, 28,919.96 and 12,011.68

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Solution

The fourth proportional to 20,967.45, 28,919.96 and 12,011.68 is: 16,567.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.45 : 28,919.96 = 12,011.68 : x
  2. Step 2: Convert to fraction form
    20,967.45/28,919.96 = 12,011.68/x
  3. Step 3: Cross multiply
    20,967.45x = 28,919.96 × 12,011.68
  4. Step 4: Simplify right side
    20,967.45x = 347,377,305.13
  5. Step 5: Solve for x
    x = 347,377,305.13/20,967.45
  6. Step 6: Final answer
    x = 16,567.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.